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Lamp / Light
Control Circuits Page 1 Lamp Controls:
#'sAB-C DE-FG-KLM-NP-RST-UV-Z Last Updated on:
Monday, October 03, 2011 06:07 PM
Circuits
Designed by Dave Johnson, P.E. :
1
WATT FLUORESCENT LAMP NIGHT LIGHT If you are tired of replacing small night light lamps, try this circuit. The
line powered circuit uses a long life cold cathode fluorescent lamp. A simple charge
pump technique runs the lamp without any transformer.
1W White LED Night Light As many of you
know, I have a pet peeve with poorly made LED night lights. Often, the light
from the LED quickly fades, so within months, the light is useless. I have
posted several versions of modified night lights using higher quality
components.....
5W FLUORESCENT LAMP INTENSITY MODULATOR
The circuit was designed to experiment with using small fluorescent lamps as a broad
pattern source of modulated light. The circuit hits the small lamp with narrow 1us
pulses at a rate of 10KHz. Each pulse launches about 10 watts of visible light. The
lamp starting method is a bit crude but the circuit does work.
12v Light/Dark Lamp Switch At night, this
circuit will route current to a 12v lamp, turning it on. (added 7/06)
60 Watt Lamp with Auxiliary 14v LED Lamp This circuit
controls power to a standard 60 watt lamp plus generates an auxiliary 14v DC supply
which can power an automotive style 12 LED array. (added 7/06)
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
µC implements Pushbutton Light Dimmers - 06/18/98 EDN-Design
Ideas.....A project required building a synchronous-demodulator circuit to
track a line drawn on paper. beauty of
synchronous-modulator/demodulator approach is its inherent noise
rejection. method rejects ….File contains several circuits, scroll
to find this one..... [Design Idea by William Grill, Riverhead Systems,
Littleton, CO]
1 Watt Fluorescent Lamp Night Light - If you are tired of
replacing small night light lamps, try this circuit. The line powered
circuit uses a long life cold cathode fluorescent lamp. A simple charge
pump technique runs the lamp without any transformer. …. [Designed by
David A. Johnson]
1.5 Hour Lamp Fader (Sunset Lamp) - The sunset lamp comes on at
full brightness and then slowly fades out over 1.5 hours time and stays
off until power is recycled…. [Design by Bill Bowden]
1.5 volt dual LED flasher - This 1.5 volt led fasher runs more than a year
on a single 'd" cell and alternately flashes 2 LEDs at about a 1 second rate. The
circuit employs a 74HC14 CMOS hex inverter that will operate at very low voltages
(less than 1 volt). One section is used as a squarewave oscillator (pins 1 and 2),
while the others are wired to produce a short 10mS pulse on alternate edges of the
square wave so the LEDs will alternate back and forth. The output sections each use a
capacitor charge pump to increase the voltage for the LEDs..... [Bill Bowden design
this one]
10 Stage LED Sequencer (Bowden) - The 4017 is a CMOS decade counter with 10
decoded outputs. Inputs include a clock (pin 14), a reset (pin 15), and a clock
inhibit (pin 13)….(design added 5?09)
10 Stage Light Sequencer - schematic only -- flashes 10 low voltage bulbs,
operates at10-25-Volt voltage, in PDF format, text in Finnish (added 4/02)
10 to 100 LED Sequencer Using a Matrix - The circuit above illustrates
using a 10x10 matrix to sequence up to 100 LEDs with just three ICs and 20
transistors. The two 4017 decade counters control the 10 rows and 10 columns so that
one LED is selected depending on the output of the decade counters. The LED circuit is
drawn showing 25 LEDs and 10 transistors but can be expanded up to a 100..... [Bill
Bowden's website]
